142 



CARL R. MOORE 



of 17 per cent, 24 per cent, and 30 per cent in three lots observed. 

 The tendency of growth in the total absence of gonads would 

 then be to equalize the weight of the two sexes, but whether 

 this condition would actually be realized is uncertain. At any 

 rate a spayed female with grafted testis would increase in weight 

 above the normal for females not because of the testis, but 

 because of the absence of the ovary. These factors alone would 

 tend to make the weight of an animal a very unsatisfactory test 

 of maleness or femaleness. 



TABLE 1 



I 



II 



III 



IV 

 V 



VI 

 VII 

 VIII 



IX 



Female with testis. 

 Female with testis. 

 Female (normal) . . . 

 Male with ovary. . . 

 Male with ovary. . . 

 Female with testis. 



Male (normal) 



Male with ovary. . . 

 Female (normal) . . . 



BODY 

 LENGTH, 



AGE 

 261 DAYS 



18.0 



17.5 



18.0 



1 



18.5 



18.5 



20.5 



19.25 



17.5 



1 No. IV, killed at age of 238 clays. 



Many factors also enter in that tend to discount the apparent 

 specificity of length as a determinant of sex. Stotsenburg's 

 early spayed females were found to increase in body length over 

 that of the normal females. Here again, if these animals had 

 possessed transplanted testis their increase in length could not 

 be considered as a result of the secretion of the testis, but rather 

 of absence of the secretion of the ovary. Nevertheless, to ob- 

 tain whatever evidence possible a careful series of weights has 

 been kept on the litter in question and is given in table 1. At 

 the termination of the experiment the total body length of each 

 was recorded.-^ 



^ The length of the body and tail, often employed, could not be accurately 

 measured, as a small piece of the tail had been removed from some of them as a 

 distinguishing mark for those individuals. 



